Quantized topological magnetoelectric effect of the zero-plateau quantum anomalous Hall state

Jing Wang, Biao Lian, Xiao Liang Qi, Shou Cheng Zhang

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The topological magnetoelectric effect in a three-dimensional topological insulator is a novel phenomenon, where an electric field induces a magnetic field in the same direction, with a universal coefficient of proportionality quantized in units of e2/2h. Here, we propose that the topological magnetoelectric effect can be realized in the zero-plateau quantum anomalous Hall state of magnetic topological insulators or a ferromagnet-topological insulator heterostructure. The finite-size effect is also studied numerically, where the magnetoelectric coefficient is shown to converge to a quantized value when the thickness of the topological insulator film increases. We further propose a device setup to eliminate nontopological contributions from the side surface.

Original languageEnglish (US)
Article number081107
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number8
DOIs
StatePublished - Aug 10 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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